The drop ship was always going to have problems coming down. Unfortunately for the 100 they ended up in Ice Nation territory where the locals were far less forgiving. With all the wristbands gone and the survivors unable to contact the ark, the ark never came down. Now four years later the surviving members of the 100 have been assimilated into Nia's army. When Lexa calls for the armies of the coalition to march on the mountain Clarke finds herself leading the Ice Nation forces